[tex]Dane:\\ n=300\\ t=1min=60s\\ d=0,4m\Rightarrow r=0,2m\\ Oblicz:\\ v=?\\ Rozwiazanie:\\ f=\frac{n}{t}\\\\\ f=\frac{300}{60}\\\\ f=5Hz\\\\ \omega=2\pi f\\ \omega=2*3,14*5\\ \omega=31,4\frac{rad}{s}\\\\ v=\omega r\\ v=31,4*0,2\\ v=6,28\frac{m}{s}[/tex]
